You can repeat it twice, altogether three times! In case of a multiple application you need to pay the application fee only once, but you must pay the exam fee each time when you repeat the entrance test!

Do I need a visa to study in Hungary?

It depends on your country of citizenship. Those who need visa to enter Hungary have to apply in time as the process might take weeks. Students from visa-free countries can enter Hungary without visa, but have to register at the local Immigration Office.http://konzuliszolgalat.kormany.hu/en